Like this:

With all the talk about “Demonetization” at YouTube it was time we look at that. Taken directly from an article on Forbes.com by Erik Kain

One of the big, controversial stories over the past few months has been the demonetization of content on YouTube. The ‘Adpocalypse’ has hit YouTubers who deal with controversial subject matter, video games, gun reviewers and historians, as nervous advertisers pause their ad campaigns while YouTube scrambles for a solution.

The second occurred when Felix ‘PewDiePie’ Kjellberg made a video that included men he had paid to hold signs that read ‘Death to all Jews.’ Kjellberg insisted his video was satirical in nature and has since apologized. But since his channel remains the largest on YouTube, and since he was partnered with Disney’s Maker Studios at the time and worked closely with YouTube Red on original content, the backlash was intense, and the reverberations were felt throughout the YouTube community.

However, it’s important to note that not all channels or videos will get an actual human reviewer for every appeal:

Because we’re a platform that has hundreds of millions of videos, we have to set parameters around which appealed videos get reviewed first to make sure we review those videos that are getting substantial traffic. Right now, our team of expert reviewers look at appealed videos with more than 1,000 views in the past 7 days. If you want to check the monetization status before making the video public, you can upload it as unlisted. If you think we got it wrong and your channel has more than 10,000 subscribers, you can appeal, and we will review your unlisted video regardless of view count. We do this because we want to make sure that videos from channels that could have early traffic to earn money are not caught in a long queue behind videos that get little to no traffic and have nominal earnings.

In other words there is no clear answer although the article does go in to more detail HERE

Call this an observation it seems even when YouTube does “Demonetization” of someone’s video you still see the ads. Personally I think YouTube is just being greedy.